Error in curl::curl_fetch_memory(url, handle = handle) : Couldn't connect to server in R: oauth2.0_token()) -

> github_token <- oauth2.0_token(oauth_endpoints("github"), myapp)  waiting authentication in browser...       press esc/ctrl + c abort       authentication complete. error in curl::curl_fetch_memory(url, handle = handle) :        couldn't connect server 

i trying data gitapi. need use data find time repo created. have tried installing "httpuv" error same.

ps. behind proxy server.

set_config(use_proxy(url="10.3.100.207",port=8080)) 

this works fine. thank-you